👔 Created basic theme use case implementation

internal/theme/usecase/theme_ucase.go

@@ -0,0 +1,28 @@
+package usecase
+
+import (
+	"context"
+	"fmt"
+	"html/template"
+
+	"source.toby3d.me/toby3d/home/internal/theme"
+)
+
+type themeUseCase struct {
+	themes theme.Repository
+}
+
+func NewThemeUseCase(themes theme.Repository) theme.UseCase {
+	return &themeUseCase{
+		themes: themes,
+	}
+}
+
+func (ucase *themeUseCase) Do(ctx context.Context) (*template.Template, error) {
+	out, err := ucase.themes.Get(ctx)
+	if err != nil {
+		return nil, fmt.Errorf("cannot find theme: %w", err)
+	}
+
+	return out.Lookup("baseof"), nil
+}